From Avalara LandedCost, by the LandedCost Research Team, updated June 1, 2017.
This page provides an overview of the basic import duty rates applied to goods that fall under the classification code 7019191025 in Portugal. This product category is defined to include:
"Yarn of 5.1?tex or more but not more than 6.0?tex, obtained from continuous glass-spun filaments, in which filaments of a diameter of 4.83??m or more but not more than 5.83??m predominate"